Scotland is not afraid that using solar power in such a cold and rainy region would be inefficient, because direct solar rays are not necessary to generate energy – just daylight is enough. According to the Energy Saving Trust, the usual solar photovoltaic system with the power of 3 kW (kilowatt) in Scotland generates around 2300 kWh (kilowatt hours) of electricity every day, which accounts for around 75% of electricity consumed by an average household.